Valve mechanism.



J. T. UNDERWOOD.

VALVE MECHANISM.

APPLICATION nun MAR. 21, 191

1,086,424. Patented Feb. 10, 1914.

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J. T; UNDERWOOD.

VALVE MBOHANISM. APPLICATION FILED MAR. 21, 1912 1,086,424. Patented Feb. 10, 1914.

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UNITED STATES PATENT OFFICE.

JOHN T. UNDERW'OOD, OF LOGAN, OHIO.

VALVE MECHANISM.

To all whom it may concern:

Be it known that I, JOHN T. UNonRwooD, a citizen of the United States, residing at Logan, in the county of Hocking and State of Ohio, have invented a certain new and useful Improvement in Valve Mechanism, of which the following is a specification.

This invention relates more particularly to means for controlling and regulating the supply of gas to the burners in gas burning kilns, such, for example, as shown in my Letters Patent of the United States dated April 4, 1911, No. 988,411.

The object of the invention is to render the control and regulation of the gas supply convenient so that a uniform temperature may be had in the kiln or a temperature at one or more points greater or less than at other points as may be desired.

The invention is embodied in the construction herein shown and described and then pointed outin the claim.

In the accompanying drawingsFigure 1 is an exterior view of a kiln having my invention applied thereto. Fig. 2 is a section through one of the burners of a kiln. Fig. 3 is a detail view in elevation but partly broken out and on a larger scale than in the former views showing the winding devices for the wires or cables that are connected with the gas controlling valves. Fig. i is a section on the line 0750 Fig. 3 looking to the right.

The invention is shown as designed for a multiple burner such as appears in my aforesaid patent. Referring more particularly to Fig. 2, where one of the said burners is illustrated, the character 16 designates a gas duct arranged along the side of a firing chamber 10. The lateral branch pipe 17 from said duct leads upward and then at angles thereto into the burner 13 which can also receive an air supply from a duct 1 1. The supply of gas from the pipe 17 to the burners is controlled by a valve 18 seating on a seat 19 in the vertical portion of the branch pipe, said valve having a rod 18 attached to it that extends up through the filling between the arches of the firing chambers, all as in my aforesaid patent.

My invention pertains more particularly Specification of Letters Patent.

Application filed March 21, 1912.

Patented Feb. 10, 1914. Serial No. 685,377.

to means for controlling the position of valves 18 so as thereby to regulate the quantity of gas passing from the pipe 17 into the burner. Connected with each of the valve rods 18 is a suitable flexible device, cable or wire 19 that is passed over a pulley as at 20 mounted near the upper end of the rod 18 and thence to a pulley as at 21 mounted near the outer wall of the kiln. From the pulley 21 the cable is carried down near the side of the wall into a box 22 where it is attached to a winding shaft 23. The box 22 is located on the exterior of the kiln within easy reach of the attendant standing on the ground. Each winding shaft 23 has secured on its outer end beyond the face of the box 22 ratchet wheel 24: adapted to be engaged by a stop pawl 25 pivoted on the face of the box. By turning the winding shaft 23 with a key 26 the valve 18 can be raised or lowered to the position necessary to admit to the burner the desired quantity of gas, and as the pawl after such winding abuts against the appropriate tooth of the ratchet the valve can be held in the position to which it is adjusted. To turn the shaft in one direction the pawl must be removed and held removed. This can be done with the hand. A peep hole as at 27 permits the attendant to observe the state of the fire at any burner, and he can regulate and control the same without climbing to the top of the kiln. The box 22 protects the wound portions of the cables from snow and ice.

lVhat I claim is:

In a valve mechanism for a gas furnace, the combination of a plurality of burners and gas supply pipes therefor, valves for controlling the gas supply through said pipes, flexible devices connected with said valves and extending to the exterior of the wall of the furnace, a box or casing into which said flexible devices extend, rotary Winding devices for said flexible devices in said box or casing, and means for latching said winding devices from rotation, substantially as described.

JOHN T. UNDERWVOOD.

\Vitnesses:

M. L. Foo'rn, BENJ. FINOKEL.

copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. C. 

